Physics Exam Past Questions and Answers | JAMB, WAEC and NECO

Physics is the science that studies the nature and properties of matter and energy. It covers topics like motion, heat, light, sound, electricity, magnetism, and the structure of atoms.

• Question 851: In order to find the depth of the sea, a ship sends out a sound wave and receives an echo after one second. If the velocity of sound in water is 1500ms^-1, what is the depth of the sea? Options:
  A) 0.75km
  B) 1.50km
  C) 2.20km
  D) 3.00km
  E) 3.75km
  Show Answer
  The correct answer is A .
• Question 852:

  

  In the figure above, the coefficient of static friction is 0.5. If the tension in the string is T, the acceleration of the system in motion is

  Options:
  A) 5 ms^-2
  B) 15 ms^-2
  C) 3 ms^-2
  D) 9 ms^-2
  Show Answer
  The correct answer is A .
• Question 853: A bar magnet is most effectively demagnetized by Options:
  A) placing it in a N - 5 position and hitting it with a hammer
  B) subjecting it to an electric current from a battery
  C) bringing its north pole in contact with the north pole of a very strong magnet
  D) heating the magnet
  Show Answer
  The correct answer is A .
• Question 854: Calculate the time taken for a mango fruit that fall from the tree 20 m to the ground [g = 10 ms^-2] Options:
  A) 10s
  B) 5s
  C) 4s
  D) 2s
  Show Answer
  The correct answer is D .
• Question 855: The wavelength of a stationary wave is 24.0cm. What is the distance between a node and the next antinodes? Options:
  A) 6.0cm
  B) 12.0cm
  C) 18.0cm
  D) 24.0cm
  E) 48.0cm
  Show Answer
  The correct answer is A .
• Question 856:

  In a resonance tube experiment, a tube of fixedlength in closed at one end and several turningforks of increasing frequency used to obtainresonance at the open end. If the turning fork withthe lowest frequency which gave resonance had a frequency ƒ₁ and the next turning fork to giveresonance had a frequency ƒ₂, find the ratio ƒ₂/ ƒ₁.

  Options:
  A) 2
  B) 3
  C) 1/2
  D) 8
  Show Answer
  The correct answer is D .
• Question 857: The length of a displaced pendulum ball which passes its lowest point twice every seconds is [g = 10m^-2] Options:
  A) 0.25 m
  B) 0.45 m
  C) 0.58m
  D) 1.00m
  Show Answer
  The correct answer is A .
• Question 858: Which of the following has no effect on radiation? Options:
  A) nature of surface
  B) density
  C) surface area
  D) temperature
  Show Answer
  The correct answer is B .
• Question 859:

  An a.c of 1A at a frequency of 800 cycles per second flows through a coil, the inductance of which is 2.5mH and the resistance of which is 5Ω. What is the power absorbed in the Coil?

  Options:
  A) 5W
  B) 6W
  C) 7W
  D) 8W
  Show Answer
  The correct answer is A .
• Question 860: In a resonance tube experiment, a tube fixed length is closed at one end and several tuning forks of increasing frequency used to obtain resonance at the open end. If the tuning fork with the lowest frequency which gave resonance had a frequency f₁ and the next tuning fork to give resonance had a frequency f₂, find the ratio $\frac{f^2}{f^2}$. Options:
  A) 8
  B) 3
  C) 2
  D) $\frac{1}{2}$
  E) $\frac{1}{3}$
  Show Answer
  The correct answer is B .